//
//  Cat.h
//  DebugDemo
//
//  Created by XFB on 2018/11/20.
//  Copyright © 2018年 ZhouCheng. All rights reserved.
//

#import <Foundation/Foundation.h>

/// xcode10提示 如果给下面的属性赋值为空的时候，有提示
NS_ASSUME_NONNULL_BEGIN

@interface Cat : NSObject

@property (nonatomic, assign) int age;
@property (nonatomic, assign) int level;

@end

NS_ASSUME_NONNULL_END
